78248223446858 has 4 divisors (see below), whose sum is σ = 117372335170290. Its totient is φ = 39124111723428.

The previous prime is 78248223446843. The next prime is 78248223446971. The reversal of 78248223446858 is 85864432284287.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78227886690409 + 20336756449 = 8844653^2 + 142607^2 .

It is a super-2 number, since 2×78248223446858² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78248223446791 and 78248223446800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19562055861713 + ... + 19562055861716.

Almost surely, 2^{78248223446858} is an apocalyptic number.

78248223446858 is a deficient number, since it is larger than the sum of its proper divisors (39124111723432).

78248223446858 is a wasteful number, since it uses less digits than its factorization.

78248223446858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39124111723431.

The product of its digits is 1321205760, while the sum is 71.

The spelling of 78248223446858 in words is "seventy-eight trillion, two hundred forty-eight billion, two hundred twenty-three million, four hundred forty-six thousand, eight hundred fifty-eight".